90 lumina apv 3.1 liter has tbi injector assembly. Car ran rough so the fuel
pump was replaced. Car still ran rough so the whole distrbutor and gear
assembly was replaced. After that car did not start. So the mechanic tried to
put it back in time by algning crankshaft pulley notch on zero and putting
distributor rotor to fire on that plug no. I checked the car for my friend
beind this mechanic and this is the results. Now, car gets spark and and fuel
pump comes on. But, the injectors will not come on. Noid light will not light
when cranking car. All fuses are okay and so are the relays. The injectors
spray fuel if I put 12 volts directly to them after I allowed fuel pump to
build up pressure by turning key on. Then it runs until all fuel is burned up.
My friend had the computer swapped with a used one but that didnt solve the
problem. Could it still be ecm. Could it still have something to do with the
timing if the distributor gear is not where it should be with the cam even if
rotor is aligned to shoot no. cylinder at tdc. Is there an alignment mark on
the distributor gear that could be unaligned and therefore the computer
allows spark and fuel pump to come on but wont allow injector to come on. If
it is unaligned how do you manually align the distributor gear with the cam
and the distribitor housing with the correct position on the motor? Or could
it be short circuit injectors causing the problem but when applied 12 volts
direct they still spray. Please help with any other checks. Could it be
something else like a loose ground? I mainly do autoglass but can do almost
any mechanical work on a car. Im not good with the electrical part especially
fuel injectors though. However, I can see that this is a very good forum.
Thanks and sorry for being long-winded.